Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9855622abfea9896c03c5cfdfd63cfe6a309335e17f2a68ba0015d8a4432d991' 
  AND token = 'I9gFfJO8R6yNHUUquBMoLRfwfMJ+IaEw2SwfE9yl+WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}